arm: dts: k3-am625-*: Mark memory with u-boot,dm-spl

Mark the memory node with u-boot,dm-spl so we can use it
from early SPL on both R5 and A53.

Signed-off-by: Georgi Vlaev <g-vlaev@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/dts/k3-am625-sk-u-boot.dtsi b/arch/arm/dts/k3-am625-sk-u-boot.dtsi
index e1971ec..159fa36 100644
--- a/arch/arm/dts/k3-am625-sk-u-boot.dtsi
+++ b/arch/arm/dts/k3-am625-sk-u-boot.dtsi
@@ -13,6 +13,10 @@
 	aliases {
 		mmc1 = &sdhci1;
 	};
+
+	memory@80000000 {
+		u-boot,dm-spl;
+	};
 };
 
 &cbass_main{